:root{color-scheme:dark;--mint:#a4edcc;--muted:#8090a7;--line:#ffffff16;--bg:#050914}*{box-sizing:border-box}body{margin:0;overflow:hidden;background:var(--bg);color:#edf2fa;font-family:'Noto Sans KR',system-ui,sans-serif;font-size:13px}button,select,input{font:inherit}button,select{background:#0d1724b8;color:inherit;border:1px solid var(--line);border-radius:8px;cursor:pointer}button{padding:10px 16px;transition:background .2s,border .2s}button:hover{background:#18312e;border-color:#a4edcc70}button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid var(--mint);outline-offset:4px}button:disabled{opacity:.3;cursor:default}#viewport,canvas,.vignette{position:fixed;inset:0;width:100%;height:100%}canvas{touch-action:none;cursor:grab}canvas:active{cursor:grabbing}.vignette{pointer-events:none;background:linear-gradient(90deg,#050914e8,transparent 46%,transparent 82%,#05091470),linear-gradient(0deg,#050914 0%,transparent 35%,transparent 78%,#050914b5)}header{position:fixed;top:0;left:0;right:0;height:100px;display:flex;align-items:center;padding:0 44px;gap:28px;border-bottom:1px solid var(--line)}.brand{color:#fff;text-decoration:none;letter-spacing:.18em;font-size:25px;font-weight:800;display:flex;align-items:center;gap:9px}.brand span{color:var(--mint);font-size:35px;font-weight:400}.header-caption{font-size:12px;color:#c2cad6;padding-left:24px;border-left:1px solid var(--line)}.header-caption span{display:block;font-size:8px;letter-spacing:.16em;color:#748299;margin-top:5px}header>button{margin-left:auto;background:transparent;font-size:11px}header>button span{margin-left:15px;color:var(--mint)}.story{position:fixed;left:46px;top:calc(20% + 10px);width:288px;pointer-events:none}.eyebrow{font-size:10px;letter-spacing:.2em;color:var(--mint);display:flex;align-items:center;gap:10px}.live-dot{width:5px;height:5px;border-radius:50%;background:var(--mint);box-shadow:0 0 12px var(--mint)}.step{color:#60728d;font-size:10px;letter-spacing:.15em;margin-top:34px}h1{font-size:42px;font-weight:600;letter-spacing:-.065em;line-height:1.25;margin:12px 0 24px;word-break:keep-all}#description{color:#a3b0c3;font-size:13px;line-height:1.95;word-break:keep-all;max-width:264px}.measure{margin-top:33px;padding-top:20px;border-top:1px solid var(--line)}.measure span{display:block;font-size:10px;color:var(--muted);margin-bottom:9px}.measure strong{font-size:20px;font-weight:500;letter-spacing:-.03em}.badge{display:inline-block;border:1px solid #a4edcc30;color:var(--mint);padding:5px 8px;border-radius:4px;font-size:9px;margin-top:16px}.model-note{color:#60738e;font-size:10px;line-height:1.7;margin-top:13px;max-width:265px}.chapters{position:fixed;right:37px;top:24%;display:grid;gap:11px}.chapters button{text-align:left;color:#66778e;font-size:9px;border:0;background:transparent;padding:7px 9px}.chapters span{margin-left:13px;font-size:11px}.chapters button.active{color:var(--mint);background:#a4edcc0b}.chapters button.active:before{content:'';position:absolute;right:0;width:2px;height:17px;background:var(--mint)}.side-controls{position:fixed;right:45px;bottom:218px;display:flex;gap:7px}.side-controls button{width:36px;height:36px;padding:0;font-size:19px}.scene-tag{position:fixed;left:57%;bottom:228px;transform:translateX(-50%);text-align:center;pointer-events:none}.scene-tag>span{font-size:9px;letter-spacing:.25em;color:#c2d2e3}.scene-tag small{display:block;font-size:7px;color:#68788e;letter-spacing:.15em;margin-top:7px}.render-status{position:fixed;left:46px;bottom:212px;color:#587286;font-size:9px;letter-spacing:.06em}footer{position:fixed;left:35px;right:35px;bottom:22px;padding:22px 24px 14px;border:1px solid #ffffff17;border-radius:14px;background:#0b1221d9;backdrop-filter:blur(15px)}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.length>span{display:block;font-size:8px;letter-spacing:.18em;color:#71839b;margin-bottom:5px}.length strong{font-family:Consolas,monospace;font-size:21px;font-weight:400;color:#d4eee6}.travel{display:flex;gap:7px}.travel button{padding:9px 12px;font-size:13px}.travel #play{min-width:120px;color:var(--mint);background:#a4edcc0b}.travel span{font-size:11px;margin-left:8px}.choose select{max-width:210px;font-size:11px;padding:10px}.ruler{position:relative;margin-top:20px;height:43px}.ruler-lines{height:10px;background:repeating-linear-gradient(90deg,#57718466 0px,#57718466 1px,transparent 1px,transparent 1.61%);pointer-events:none;position:absolute;top:8px;width:100%}#scale{position:relative;z-index:1;width:100%;margin:0;height:15px;appearance:none;background:transparent;cursor:ew-resize}#scale::-webkit-slider-runnable-track{height:2px;background:#3c5769}#scale::-webkit-slider-thumb{appearance:none;height:14px;width:7px;background:var(--mint);border-radius:2px;margin-top:-6px;box-shadow:0 0 14px #a4edcc77}#scale::-moz-range-track{height:2px;background:#3c5769}#scale::-moz-range-thumb{height:14px;width:7px;background:var(--mint);border:0;border-radius:2px}#ticks span{position:absolute;top:27px;transform:translateX(-50%);font-size:8px;color:#8494a9}#ticks span:first-child{transform:none}#ticks span:last-child{transform:translateX(-100%)}.footer-bottom{border-top:1px solid var(--line);padding-top:10px;display:flex;justify-content:space-between;font-size:8px;color:#74849a}.dim{color:#43546b;margin:0 10px}.footer-bottom i{font-style:normal;padding:0 6px;color:#45546b}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}#loading{position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;flex-direction:column;z-index:20;transition:opacity .5s}#loading.done{opacity:0;pointer-events:none}#loading strong{font-size:20px;letter-spacing:.4em;margin-top:30px}#loading p{font-size:11px;color:#8090a7}.loader-orbit{width:70px;height:70px;border:1px solid #a4edcc22;border-top-color:var(--mint);border-radius:50%;animation:spin 2s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}dialog{color:#d8e1ec;background:#0c1423;border:1px solid #33465d;border-radius:15px;padding:32px;width:min(570px,92vw);max-height:85vh}dialog::backdrop{background:#000b;backdrop-filter:blur(8px)}dialog h2{font-size:29px;letter-spacing:-.04em;line-height:1.45}dialog h3{font-size:15px;margin-top:26px}dialog p{font-size:12px;line-height:1.95;color:#9daec3}.close{float:right;font-size:20px;padding:0 10px}.settings{display:grid;gap:13px;padding:20px 0;border-top:1px solid var(--line)}.settings select{padding:9px}.sources{display:flex;flex-wrap:wrap;gap:16px}.sources a{color:var(--mint);font-size:10px}#error{position:fixed;z-index:30;inset:25% 15%;padding:30px;background:#111c2f;border:1px solid #7791aa;border-radius:12px}#error p{line-height:1.8}#error[hidden]{display:none}
@media(max-width:1000px){.story{width:235px;left:26px}h1{font-size:34px}#description{font-size:12px}.chapters{right:20px}.chapters span{margin-left:7px}.model-note{font-size:9px}header{padding:0 25px}.render-status{left:26px}}
@media(max-width:700px){header{height:75px;padding:0 19px;gap:15px}.brand{font-size:20px}.brand span{font-size:27px}.header-caption{padding-left:13px;font-size:10px}.header-caption span{display:none}header>button{font-size:10px;padding:8px}header>button span{margin-left:2px}.story{top:98px;left:21px;width:230px}.eyebrow{font-size:8px}.step{margin-top:13px;font-size:8px}h1{font-size:29px;margin:8px 0 11px}#description{font-size:11px;line-height:1.7;max-width:215px}.measure{border:0;margin-top:12px;padding-top:0}.measure span{display:none}.measure strong{font-size:16px}.badge{margin-top:9px;font-size:8px}.model-note{display:none}.chapters{display:none}.vignette{background:linear-gradient(180deg,#050914b0,transparent 65%,#050914)}footer{left:10px;right:10px;bottom:10px;padding:14px 13px 10px}.length strong{font-size:15px}.length>span{font-size:7px}.travel{gap:3px}.travel button{padding:7px 8px}.travel #play{min-width:37px}.travel span{display:none}.choose select{font-size:10px;max-width:135px;padding:8px 3px}.ruler{margin-top:15px}.footer-bottom{font-size:7px}.footer-bottom>span:first-child{display:none}.footer-bottom>span:last-child{margin:auto}.side-controls{right:16px;bottom:190px;display:grid}.side-controls button{width:32px;height:32px}.scene-tag{left:50%;bottom:197px}.scene-tag>span{font-size:8px}.render-status{left:22px;bottom:176px;font-size:7px}.ruler #ticks span{font-size:7px}#ticks span:nth-child(even){display:none}.scene-tag small{font-size:6px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
/* Continuous SI-scale explorer */
#breadcrumbs{position:fixed;top:110px;left:46px;right:200px;font-size:9px;color:#8ea4b8;display:flex;gap:7px;flex-wrap:wrap;z-index:4}
#breadcrumbs button{border:0;background:transparent;padding:2px;color:#8096aa;font-size:9px}
#breadcrumbs button:last-child{color:var(--mint)}
.story{top:180px}.story #return-main{pointer-events:auto;font-size:10px;margin-top:12px}
.story h1{font-size:37px}.model-note{font-size:9px;max-width:285px}
.chapters{top:19%;gap:5px}
#markers{position:fixed;inset:0;pointer-events:none;z-index:3;overflow:hidden}
.anchor-marker{position:absolute;pointer-events:auto;transform:translate(-50%,-50%);padding:0;border:0;background:transparent;color:#c5e5dc;white-space:nowrap;max-width:240px;text-align:left}
.anchor-marker:hover{background:transparent;border:0}
.anchor-marker .dot{display:block;width:12px;height:12px;border:1px solid #a8ebd8aa;border-radius:50%;background:#07161c55;box-shadow:0 0 0 4px #b2e7d00a}
.anchor-marker .label{position:absolute;left:19px;top:-2px;font-size:10px;text-shadow:0 1px 8px #000,0 1px 3px #000}
.anchor-marker small{display:block;font-size:8px;color:#8dabaf}
.anchor-marker.next .dot{border-color:#d0edb5;box-shadow:0 0 0 5px #b2e7d011,0 0 16px #a9dfbf22}
.anchor-marker.next .label{color:#dcf0c8}
.metric{position:fixed;right:210px;bottom:217px;text-align:center;z-index:4;color:#b9cbbb;font-size:10px}
#metric-bar{height:7px;border:1px solid #c8dbcd;border-top:0;margin:0 auto 5px}
.metric small{display:block;font-size:8px;color:#6f8796;margin-top:3px}
.length small{display:block;color:#6f8499;font-size:8px;margin-top:4px}
#map-credit{position:fixed;left:46px;bottom:207px;font-size:8px;color:#91a59e;text-decoration:none;z-index:5}
#map-credit[hidden]{display:none}.render-status{bottom:226px;max-width:310px}
.scene-tag{bottom:229px;left:57%}.scene-tag small{letter-spacing:.07em}
#scene-label{font-size:9px;color:#8da8ba}
#render-status{font-size:8px}.vignette{background:linear-gradient(90deg,#050914ed,transparent 40%,transparent 85%,#05091450),linear-gradient(0deg,#050914,transparent 29%,transparent 85%,#05091490)}
@media(max-height:800px) and (min-width:701px){.story{top:150px}.story h1{font-size:31px;margin-bottom:14px}.story .step{margin-top:15px}.measure{margin-top:17px;padding-top:12px}#description{font-size:11px}.model-note{display:none}.chapters{top:20%;gap:1px}}
@media(max-width:700px){#breadcrumbs{top:82px;left:20px;right:20px;font-size:7px;max-height:34px;overflow:hidden;gap:3px}#breadcrumbs button{font-size:7px}.story{top:122px;width:210px}.story h1{font-size:27px}.story .step{margin-top:8px}#description{font-size:10px;max-width:200px}.measure strong{font-size:14px}.badge{font-size:7px;max-width:220px;line-height:1.5}.metric{right:70px;bottom:191px;font-size:8px}.metric small{font-size:6px}.render-status{left:20px;bottom:180px;font-size:7px;max-width:230px}#map-credit{left:20px;bottom:170px;font-size:6px}.scene-tag{display:none}.length strong{font-size:13px}.length small{font-size:6px}.choose select{max-width:125px}footer{padding-top:11px}.side-controls{bottom:205px}.anchor-marker .label{font-size:9px}.anchor-marker small{font-size:7px}.anchor-marker .dot{width:9px;height:9px}#return-main{font-size:8px!important;padding:5px!important}.vignette{background:linear-gradient(180deg,#050914cc,transparent 54%,transparent 76%,#050914)}}

@media(min-width:701px){.vignette{background:linear-gradient(90deg,#030711fa 0%,#030711dc 23%,#03071140 39%,transparent 54%,transparent 85%,#03071150),linear-gradient(0deg,#030711,transparent 29%,transparent 85%,#03071190)}}

@media(max-width:700px){.story{text-shadow:0 2px 8px #000}.vignette{background:linear-gradient(180deg,#050914ee 0%,#050914b8 22%,transparent 43%,transparent 76%,#050914)}}

/* Reading stays available without covering the main 3D view by default. */
.story #learn{pointer-events:auto;margin-top:12px;font-size:11px;color:var(--mint)}
#learning{position:fixed;z-index:12;right:24px;top:112px;bottom:210px;width:370px;max-width:calc(100vw - 32px);overflow-y:auto;padding:25px;background:#0a1526f5;border:1px solid #78908f55;border-radius:14px;box-shadow:0 12px 55px #0008;overscroll-behavior:contain}
#learning[hidden]{display:none}#learning h2{font-size:25px;margin:12px 0}#learning h3{font-size:13px;color:#b8e2d0;margin:23px 0 7px}#learning p{font-size:12px;line-height:1.95;color:#c1cbd5;word-break:keep-all}#close-learning{float:right;font-size:22px;padding:0 9px}#learning .sources{margin:22px 0}#learning .worksheet{display:block;font-size:11px;color:#afe8d2;padding:15px 0;border-top:1px solid #ffffff20}
@media(max-width:700px){#learning{inset:88px 12px 178px;width:auto;max-width:none;padding:19px}.story #learn{font-size:10px;padding:6px 10px;margin-top:8px}.story #description{max-height:7em;overflow:auto;pointer-events:auto}.story .measure{margin-top:9px}}
@media(max-height:720px) and (min-width:701px){.story{top:130px}.story h1{font-size:27px;margin-bottom:10px}#description{line-height:1.65}.badge{margin-top:8px}.story #learn{margin-top:8px}}

#map-credit{font-size:8px;line-height:1.45;bottom:202px;max-width:560px}#map-credit a{color:#b1c8ba;text-decoration:none}#render-status{bottom:244px}@media(max-width:700px){#map-credit{left:20px;bottom:164px;max-width:280px;font-size:7px}#render-status{bottom:203px}}

#orbit-tools{position:fixed;z-index:5;top:112px;right:155px;width:380px;max-width:calc(100vw - 32px);padding:12px 14px;border:1px solid #aec7df33;border-radius:12px;background:#0a1424eb;backdrop-filter:blur(10px)}
#orbit-tools[hidden]{display:none}.orbit-toolbar{display:flex;align-items:center;gap:6px}.orbit-toolbar strong{font-size:11px;margin-right:auto}.orbit-toolbar button{font-size:10px;padding:6px 8px;white-space:nowrap}.orbit-toolbar button[aria-pressed=true]{border-color:#a4edcc90;color:#a4edcc;background:#a4edcc13}
#orbit-legend{display:flex;flex-wrap:wrap;gap:7px 12px;margin-top:12px}#orbit-legend span{display:flex;align-items:center;gap:5px;font-size:10px;color:#d0dbe6}#orbit-legend i{display:inline-block;width:14px;height:2px;background:var(--orbit-color)}#orbit-tools p{font-size:9px;line-height:1.5;color:#a5b3c6;margin:9px 0 0}
@media(max-width:700px){#orbit-tools{top:auto;bottom:178px;left:12px;right:12px;width:auto;padding:10px}#orbit-tools .orbit-toolbar strong{font-size:10px}#orbit-legend{gap:6px 10px;margin-top:9px}#orbit-legend span{font-size:9px}#orbit-tools p{font-size:8px}.orbit-toolbar button{font-size:9px;padding:5px 7px}}
.anchor-marker[data-body=pluto] .label{color:#f39bcc}.anchor-marker[data-body=pluto] .dot{border-color:#f39bcc;box-shadow:0 0 10px #f39bcc55}

@media(max-width:700px){body:has(#orbit-tools:not([hidden])) .side-controls{bottom:320px}}